emyonee

Hello I'm trying to synthesis a product (which is more polar) from catechol. The problem is catechol (dissolved in methanol) always tails when I spot it on a silica TLC plate. With this I won't be able to tell if there was any product formed in the reaction. I have tried increase the polarity of the mobile phase and reduced the concentration of catechol but still same thing. What can I do to stop the taling? Thanks.